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authorEzequiel Garcia <elezegarcia@gmail.com>2012-09-08 17:47:53 -0300
committerPekka Enberg <penberg@kernel.org>2012-09-25 10:14:18 +0300
commitf3f741019595f1e73564d985f5fe8abcbb98c769 (patch)
tree6a46da5eb60a8bd2bf6bdaf5804e40367b91048f /mm
parentff4fcd01ec86d98d15d2fd96f22f19bb1d341b88 (diff)
downloadop-kernel-dev-f3f741019595f1e73564d985f5fe8abcbb98c769.zip
op-kernel-dev-f3f741019595f1e73564d985f5fe8abcbb98c769.tar.gz
mm, slob: Add support for kmalloc_track_caller()
Currently slob falls back to regular kmalloc for this case. With this patch kmalloc_track_caller() is correctly implemented, thus tracing the specified caller. This is important to trace accurately allocations performed by krealloc, kstrdup, kmemdup, etc. Signed-off-by: Ezequiel Garcia <elezegarcia@gmail.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/slob.c27
1 files changed, 24 insertions, 3 deletions
diff --git a/mm/slob.c b/mm/slob.c
index 191e1713..dd47d16 100644
--- a/mm/slob.c
+++ b/mm/slob.c
@@ -425,7 +425,8 @@ out:
* End of slob allocator proper. Begin kmem_cache_alloc and kmalloc frontend.
*/
-void *__kmalloc_node(size_t size, gfp_t gfp, int node)
+static __always_inline void *
+__do_kmalloc_node(size_t size, gfp_t gfp, int node, unsigned long caller)
{
unsigned int *m;
int align = max(ARCH_KMALLOC_MINALIGN, ARCH_SLAB_MINALIGN);
@@ -446,7 +447,7 @@ void *__kmalloc_node(size_t size, gfp_t gfp, int node)
*m = size;
ret = (void *)m + align;
- trace_kmalloc_node(_RET_IP_, ret,
+ trace_kmalloc_node(caller, ret,
size, size + align, gfp, node);
} else {
unsigned int order = get_order(size);
@@ -460,15 +461,35 @@ void *__kmalloc_node(size_t size, gfp_t gfp, int node)
page->private = size;
}
- trace_kmalloc_node(_RET_IP_, ret,
+ trace_kmalloc_node(caller, ret,
size, PAGE_SIZE << order, gfp, node);
}
kmemleak_alloc(ret, size, 1, gfp);
return ret;
}
+
+void *__kmalloc_node(size_t size, gfp_t gfp, int node)
+{
+ return __do_kmalloc_node(size, gfp, node, _RET_IP_);
+}
EXPORT_SYMBOL(__kmalloc_node);
+#ifdef CONFIG_TRACING
+void *__kmalloc_track_caller(size_t size, gfp_t gfp, unsigned long caller)
+{
+ return __do_kmalloc_node(size, gfp, NUMA_NO_NODE, caller);
+}
+
+#ifdef CONFIG_NUMA
+void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags,
+ int node, unsigned long caller)
+{
+ return __do_kmalloc_node(size, gfp, node, caller);
+}
+#endif
+#endif
+
void kfree(const void *block)
{
struct page *sp;
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